//
//  Truck.h
//  08-HomeWork
//
//  Created by dllo on 16/7/13.
//  Copyright © 2016年 daming. All rights reserved.
//

#import <Foundation/Foundation.h>
// 自定义泛型
@interface Truck<__covariant ObjectType> : NSObject
@property (nonatomic, strong) ObjectType firstObject;
- (void)addObject:(ObjectType)object;
- (ObjectType)anyObject;
//
- (__kindof NSArray *)returnArray;
@end
